Carbureter.



Patented; Apr. 24, 1917.

2 SHEETS-SHEET l.

J. S. GOLDBERG.

CARBIJRETER.

APPLICATION FILED MAY 27. I9I2.

Patented Apr. 24, 1917.

2- SHEETS-SHEET 2.

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JOHN S. GOLDBERG, OF CHICAGO, ILLINOIS, ASSIG-NOR'TO STROMBERG MOTORDEVICES COMPANY, OF CHICAGO, ILLINOIS. A CORPORATION OF ILLINOIS.

CARBURETER.

Specification of Letters Patent.

Patented Apr. 2a, 1911"?.

Application led Hay 27, 1912. Serial No. 699,838.

To all whom t may concern.'

Be it known that I, JOHN S. GoLDnno, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Carbureters, of whichthe following is a full, clear, concise, and exact description,reference being had to the accompanying drawings, forming a. part ofthis specification.

My invention relates to carbureters for use in association with internalcombustion engines and is' concerned with improved operating means foran auxiliary air and fuel supply in addition to the primary air and fuelsupply. My invention is concerned with the form of the secondary airvalve and the manner in which the suction of the engine with which thecarbureter is associated is effective in securing its operation. Inaccordance with my invention I provide a piston chamber and a pistonwhich has its surface exposed to the pressure in thecarbureting chamber,and this piston carries a valve which controls an inlet from theatmosphere. The movement of the piston corresponds to the amount ofsuction created by the engine and the movement of the valve graduatesthe effective size of this auxiliary air inlet. It will be seen thatthis operation is auto matic. In addition to this automatic valve Iassociate with it a manually operated valve which may be moved to changethe sizev of the effective auxiliary air inlet and between the automaticvalve and this manual valve the proper amount of air, relative to theamount of fuel, is admitted so that the most advantageous proportionsmay be had at all speeds of the engine. The axis of the moving parts inmy carbureter is vertical and it will be seen that these parts are hung,rather than mounted in bearing lits, and friction is thereby greatlyreduced. There is no tendency for the valve to stick and the piston istherefore accurately responsive to the changes in the engine suction.rIhe arrangement which I provide is furthermore eective in that,although its operation is easy, it is too ponderous to respond to minuteand sudden changes in the engine suction, but is more properlyresponsive to the average effect which, of course, is the most desirablearrangement.

My invention is illustrated in the accompanying drawings, in which*Figure 1 is a View partly in elevation and partly in longitudinal axialsection;

Fig. 2 is a sectional view taken on the plane of the line 2-2 Iof Fig. 1and looking in the direction indicated by the arrows;

Fig. 3 is ay fragmental elevational view taken in the direction of thearrow 3 of Fig. 2; and

Fig. 4.- is a view similar to part of Fig. 1 but showing the piston andvalve in another position.

T he casing is illustrated at 5 and it will be seen that it provides thecarbureting chamber 6 to which the primary air passage in the form of aVenturi tube 7 leads. The outlet for the carbureting chamber 6 iscontrolled by a throttle valve 8 and is surround ed by a flange 9 bymeans of which the device may be secured to themanifold of the engine.The primary air inlet passageway' 8 connects with the lower end of theVenturi tube and this air inlet is supplemented by an air horn 9 whichis secured in place by means of a nut 10 screwing into a stud 11extending downwardly from a bridge 12 spanningthe air inlet passageway8. This air horn is provided with a valve 13 mounted upon a shaft 14extending outside the horn and provided there with an operating lever15. A spring pressed plunger 16. which is adapted to rest in grooves inthe periphery of the hub of the operating lever holds the valve 13 ineither its open or closed position. rIhe air horn 9 may be connectedwith a warm air inlet and the warm air going in in this way may bediluted by cold air entering through the side passages 17 which arecontrolled by an annular valve 1S.

The bridge 12 is in the form of a tube and forms a fuel passageway. 'Ihefuel used is in liquid form, such as gasolene, and it is introduced intothe carbureter through a float chamber 19, the details of which I am notconcerned with in the present case. The float chamber is provided withan entry cou pling 20 which is connected with the source of fuel supply.

A fuel emitting nozzle 21 is supported on top of the bridge 12 and islocated axially in the Venturi tube, ending in substantially the mostcontracted portion thereof. The

Venturi tube may be surrounded by a water jacket 22.

At one side of the carbureting chamber 6 there is provided the auxiliarysupply chamber 23 into which an auxiliary fuel nozzle 24, connected witha passageway 25, extends. The passageway 25 is connected with apassageway in the bridge 12 and is thus supplied with fuel. Below theauxiliary supply chamber 23, there is a valve chamber 26 and belowth'evalve chamber there isa piston chamber 27. A piston 28 is mounted toreciprocate vertically in the chamber 27 and it carries a tubular shaft29 which extends upwardly and which is provided with a reduced portion30 mounted to reciprocate in a boss 31 in the upper wall of the'cham.-ber 23. A4 spring 32 is disposed inside the tubular shaft 29 and betweenva shoulder 33 therein and the base of the piston chamber 27. The boreof the shaft 29 is exposed to the auxiliary supply chamber 23 and thusto the carbureting chamber -6 through the side opening 34, and it willbe seen that the pressure is accessible tothe underside of the piston 28in this way.

An annular valve 35 is disposed in the valve chamber 26 and is held inplace so that it may be given angular movement by means ofy the plate36. This valve has a central opening for the passage of the shaft 29 andis in the form of a ring in which the automatic valve 37, secured to theshaft 29, may operate. This arrangement is well illustrated in Fig. 2,where it will beseen that the valve casing 26 is provided with the sideports 38, 38 and that the valve itself is provided with openings 39, 39.It will be seen that the openings 39, 39 in the valve are diametricallyopposite as are also the openings 38, 38 in the valvel casing, and itwill also be seen that the valve may close the openings 38, 38 eitherentirely or to any desired extent. When the valve is in the positionshown in Fig. 2, the openings 38, 38 are closed. The valve casing isprovided with a slot 40 through which a stud 41,' carried by the valve35, may pass. This stud is connected by means of 'an operating lwire 42with an-operating part within easy reach of the operator, for instance,the driving seat of an automobile, and it will'be seen that he may movethe wire to give the openings 38, 38 any desired horizontal dimension.

The normal position of the valve 37 is its uppermost position, as shownin Fig. 1, and in this position it cuts olf the auxiliary supply chamber23 from both the atmosphere openings 38, 38. When the suction created inthe carbureting chamber has reached a predetermined point, however, itovercomes the tension of the spring 32 and, playing on the under surfaceof the piston 28, ydraws the piston down and with it the valve 37 sothat more or lless of the openings 38, 38 may be brought into operativeconnection with the auxiliary supply chamber. This operation isillustrated in Fig. 4.

Mounted in an opening in the top of the auxiliary supply chamber 23 is abushing 43 and a lever 44 is mounted. upon a pivot 45 carried by thisbushing. The end of this lever is bifurcated at 46 and the valve rod 30passes between the tangs. The end of the valve rod 30 is screw-threadedfor the reception of a nut 47 and it will appear that after the rod 30hasbeen lowered sulciently the nut 47 will engage the lever 44 and willcarry it down. The tail-48 of the lever engages with the valve carrier49 which extends into the chamber 23 and is there provided with a flange50 between which and the bushing 43 a spring 51 is disposed. This springtends to move the valve carrier 49 downwardly'. A needle valve 52 iscarried by the part 49 and is disposed in axial alinement with thenozzle 24 so that it may enter the nozzle and so that its verticalmovement will determine the effective area of the nozzle.- The upper endof the needle 52 is provided with a head 53 between which and the flangepiece 50 a spring 54 is disposed. Thus the needle valve, which passesthrough a somewhat enlarged opening in the valve piece 50, is mountedwith a certain amount of freeness so that it may properly seat itself inthe nozzle. It will be seen that when the auxiliary air valve is drawndown to admit more air, in response to the increased demand of theengine, the fuel valve is drawn up to ladmit more fuel, it beingunderstood that these vapors are drawn into the carbureter in additionto the primary 'air through the passageway 8 and primary fuel throughthe nozzle 21.

It will be seen that the manual valve which controls the auxiliary airinlets de termines the horizontal dimensions thereof while the automaticvalve, which responds to the suction of the engine, determines thevertical dimensions thereof. In this way the operator has control of themixture for the purposes of adjustment and at the same time he may leavethe carbureter to itself, once adjusted, for effective automaticoperation.

I claim as new and desire to secure by Letters Patent:

l. In a carbureter, a carbureting chamber, primary fuel and air inletmeans, a separate fuel nozzle leading to the carbureting chamber, avalve for said fuel nozzle, an air inlet thereto, a valve for said airinlet mechanically connected with the fuel valve, and a verticallyreciprocating piston mechanically connected with said air and fuelvalves and exposed to the pressure in the carbureting chamber.

2. In a carbureter, a carbureting chamber,

primary fuel and air inlet means, an additional fuel nozzle leadingr tothe carlnlrctiug,t Chamber, a valve for said t'uel nozzle. an air inletthereto. a valve for said air inlet mechanioall \v connected with thet'uel valve. a piston inechanicall)Y connected with said air and fuelvalves and exposed to the pressure in the carhureting chalnlrer. and amanuall)v operated valve also controlling said air inlet.

Il. In a earlmreter, a carliureting chamber, primatv tuel and air inletmeans. a separate Atuel nozzle leadingr to the earhureting: ehamher. avalve tor said fuel nozzle` an air inlet thereto. a valve tor said airinlet mechanically connectedl with thel ,tuel valve. and a pistonmeehanicallv connected with said air and tuel valves and exposed to thepressure in they carliuretiutr chamber.

-t. ln a earlmreter. a carlmreting chamber.

primarv t'uel and air inlet means-.a t'ueluozzle leading to theearhuretiug ehalnlier. a ta` pered-needle valve for .said fuel nozzle.an air inlet thereto. a valve tor said air inlet ineelianieall)vconnected with the tuel valve. and a pis-ton meehanieall \r connectedwith .said air and t'uel valves and exposed tothe pressure in thecarlmreting chamber.

5. In a earlmreter. a earhureting chamber. primary air and fuel inletmeans, a throttle valve controlling.r the outlet, a secoudar \7 tuelnozzle. a float chamber connected with both nozzles. a verticalcylindrical valve, chamber with `side outlets. a tubular valve withinsaid valve chamber operated manual17 to vary the ettective size of saidside outlets, a piston valve in said tubular valve, a piston chamberbelow said vvalve ehamher. a piston in said piston chamber. a hollow.shaft connecting said pistons, said hollow shatt passing through theearhuretcr ehaniher and having its hol'e exposed thereto. the undersideot' the piston being thus` exposed to the pressure in the carlauetint`ehamlier and the other side of the piston heing exposed to theatmosphere5 said hollow shalt extending beyond the -asing, a looselyvmounted needle valve t'or the secondaiwv fuelv inlet. a carrier for saidvalve. and a lever engaging;v .said carrier and adapted to he engaged bya part on said shat't.

(5. ln a earlmreter.a carlmreiing chamber, primaryy air and l'uel inletmeans. a secondar)v tuel nozzle. a vertical cylindrical valve chamberwith side ports. a tuhular valve within Said valve chamber operatedmanually to var v the etl'eetive size ot said side ports. a piston valvein said tuhular valve. a piston chainher helow said valve chamber. apiston in said piston ehamlier. a shalt connecting said pistons` theunder side. ol? the piston being exposed to the pressure in thecarlmretine' chalnher, and the other side ol'" the. piston heine exposedto the atmosphere. a needle. valve tor the secondari' tuehinlet. andmeans t'or mechanically' connecting said needle valve and said pistonvalve.

In witness whereof. I hereunto suliscrihe my nameV this 24th daty ofMay, A. D. 1912.

JOHN S. GOLDBICRG.

lVitnesses:

RAYMOXD M. ANDERSON, ARTI-Ion H. BOETTCHER.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents,

' Washington, D. C.

